Signaling frequency detection for a communications network

Details Signaling frequency detection for a communications network Signaling frequency detection for a communications network

1995-03-16

1996-07-16

Bowler, Alyssa H.

Communications: electrical

Continuously variable indicating

With meter reading

370 8515, 364148, H04Q 300, G05B 1300, H04J 314

Patent

active

055370985

ABSTRACT:
An apparatus is provided for detecting the signaling frequency of communications signals transported on the trunk and lobe circuits of a token ring. The communications signals including Differentially Manchester Encoded data signals. The apparatus includes an internal trunk circuit and a plurality of ports including an input port for connecting to an input trunk segment, and an output port for connecting to an output trunk segment, and a plurality of lobe ports for connecting to the lobe circuits. Means are provided for sensing the frequency of the data signals at each of said plurality of ports. The sensing means including means for taking multiple successive timing samples, and grouping the samples into quality groups.

REFERENCES:
patent: 5081641 (1992-01-01), Kotzin et al.
patent: 5103446 (1992-04-01), Fischer
patent: 5208742 (1993-05-01), Warn
patent: 5291390 (1994-03-01), Satou
patent: 5311515 (1994-05-01), Henderson et al.

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